Gwajin NDT yana nufin ba tare da son zuciya ko rinjayar aikin abin da aka gano ba, ba a cutar da ana samarwa don gano abubuwa a cikin ƙungiyar ba, amfani da abubuwan rashin daidaituwa na kayan ciki ko lahani zafi, sauti, haske, wutar lantarki, maganadisu da sauran halayen da suka haifar da canje-canje zuwa jiki. ko hanyoyin sinadarai a matsayin hanyar yin amfani da fasaha da kayan aiki na zamani, kayan aiki, samfurin samfurin da ciki na tsarin, kaddarorin, da nau'in lahani, yanayi, lamba, siffar, matsayi, girman, rarrabawa da canza dubawa da hanyoyin gwaji.Gwajin da ba mai lalacewa ba shine kayan aiki mai mahimmanci na ci gaban masana'antu yana da mahimmanci, zuwa wani lokaci yana nuna matakin ci gaban masana'antu na ƙasa, an gane mahimmancin gwajin da ba a lalata ba, babban binciken ray (RT), gwajin ultrasonic. UT), gwajin ƙwayar maganadisu (MT) da gwajin shigar ruwa (PT) huɗu.Akwai wasu hanyoyin NDT eddy halin yanzu gwajin (ECT), acoustic emission gwajin (AE), thermal imaging / infrared (TIR), leak gwajin (LT), da AC filin auna dabaru (ACFMT), Magnetic flux leakage gwajin (MFL), Ganewar gwaji mai nisa (RFT), lokacin ultrasonic na hanyar diffraction jirgin (TOFD) da makamantansu.

Gwajin NDT shine amfani da kayan sauti, na gani, maganadisu da halayen lantarki kamar, ba tare da son zuciya ba ko shafar aikin abin da aka gano na kasancewar lahani ko rashin daidaituwa a cikin gano abin gwajin, wanda aka ba da girman lahani, wuri yanayi da adadin bayanai.Idan aka kwatanta da gwajin ɓarna, gwajin da ba ya lalacewa yana da halaye masu zuwa.Na farko ba mai lalacewa ba ne, domin idan aka yi shi ba tare da lalata aikin ganowa ta hanyar amfani da abin ganowa ba;na biyu m, tun da gano ba shi da lalacewa, don haka za a iya gano abu 100% cikakken gwaji, idan ya cancanta wannan ba zai yiwu ba;na uku yana da cikakken, gano ɓarna gabaɗaya ana amfani da shi ne kawai ga gwajin albarkatun ƙasa, kamar injiniyan injiniyan da aka saba amfani da su cikin tashin hankali, matsawa, lankwasawa, da sauransu, don kera kayan da aka gama ba tare da lalacewa ba, samfuran da aka gama da kayayyaki, sai dai idan sabis ɗin ba a shirye ya bar shi ya ci gaba ba, in ba haka ba ba gano ɓarna ba ne da gwaji mara lalacewa ba tare da lalata abin da za a gano ta hanyar amfani da aikin ba.Saboda haka, ba kawai albarkatun da ake amfani da su don kera kowane matsakaicin mataki na aikin bututun ƙarfe na LSAW ba, har sai samfuran da aka gama na ƙarshe don duka gwajin, har ma akan sabis na na'urar don gwaji.

Duban gani na NDT: 1, duban lahani na walda.Bincika fasa walda, rashin cikar shigar ciki da ingancin waldawar walda.2, jarrabawar jiha.Bincika tsagewar saman, bawon, kebul, karce, haƙora, kumbura, tabo, lalata da sauran lahani.3, duban kogo.Lokacin da wasu samfurori (kamar famfo gear tsutsotsi, injuna, da sauransu) ke aiki, bisa ga buƙatun fasaha na aikin zai zama dubawa na gani mai nisa.4, duba taro.Lokacin da ake buƙata, kuma lokacin da ake buƙata, ta yin amfani da daidaitaccen binciken ingancin taro na endoscope na masana'antu mai girma uku;ko mataki bayan kammala taro, duba sassan da sassan da aka haɗa matsayi ya dace da sharuɗɗan zane ko buƙatun fasaha;kasancewar lahani na taro.5, ƙarin kayan dubawa.Bincika samfurin a cikin lumen na saura ƙura, abubuwa na waje da sauran ragowar.